C4 All Black Fin Blades

C4

$ 595.00 

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1/3 tradition, 1/3 innovation, 1/3 di design, add (sea) salt to taste. This is the recipe of our 300 foot pockets. 300 feature an elegantly balanced shape in a few hundreds grams. The technology behind this products is mainly focused on volume reduction. Volume is in fact the primary cause of foot pockets “weight” in water, which then requires a bigger effort when kicking water. So, the higher volume of water, the bigger the effort. Reducing volume, weight is reduced, and therefore reducing the ‘sinking’ effect. A 300 foot pocket size 40-41 only weighs 315gr. Compared to 600-750 gr. of standard shoes on the market.

Hydrodynamics: an efficient performance is based on resistance reduction. 300 fins elegant shape could have easily been designed by lines of water flowing on your feet without interruptions and only ongoing smooth lines. Hydrodynamics is key to reduce divers’ fatigue and these footpockets shiny look combines beauty and performance.

Lighter and stronger, more responsive and safer. These composite blades are made with carbon fabric HYERTECH – Big Square. The use of the innovative method of production, Spread Tow instead of yarn, optimizes the structure. Less intersection between the fibers and less ondulations greatly reduce the absorption of energy. Using fins this means blade's great reactive elasticity, what else?

The foot on blade thrust position is about 30mm back, it lies between toes and the metatarsus. Longerons are short where toes are and continue under the foot pocket towards the heel. They are an uninterrupted line of energy distribution between foot and blade. Longerons progressively transfer energy to the blade, allowing exceptional bending curves. Blades continue for over 20mm inside the 300 foot pocket towards the heel. Special blades must be produced to perfectly fit the 300 foot pockets.

The design of modern fins is mainly focused on achieving a better performance by increasing the total angle between the foot and the fin blade. The foot pocket blade angle must be amplified. In case of a low angle, stiffness of blades will result in fins with a reduced performance. Softer blades with a wider agle will result instead, in stiffer fins. C4 footpockets do not create this problem; all C4 anatomical footpockets have a 3° angle. The blade angle is 29°, a value much used on modern fins which determines a greater preload, making the blade more reactive. Such 29° solution, reaches an angle of 32° thanks to the 3° angle of the patented C4 footpockets providing for an excellent kinematic performance.

Ancient Romans, 2000 years ago, used to say: “In media stat virtus”, virtue stays in the middle. TUNNEL water rails (patented by C4 ) stand between EVO water rails for fishing and CONSTANT water rails for freediving. They are suitable for long and soft blades. They are designed to create a partial “tunnel” that better directs water when kicking. Preferably to be used with 300 foot pocket fins with short longerons.

TECHNICAL DATA

MATERIAL: 100% carbon fiber TR50 HYPERTECH

BLADE DIMENSION: 873 x 195 mm

BLADE HARDNESS: 25 soft – 30 medium – 40 hard

WATER RAILS: variable Tunnel ( with a patent )

FINS WEIGHT: from 600gr. up to 730 gr.

FOOT POCKET WEIGHT: 316 gr. in size 40/41

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